Gas-burning heater.



Nu. 698,5I9.

Patented Apr. 29, |902. A. W. KENT. GAS BURNING HEATER.

(Application led June 8, 1900.)

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UNITED STATES PATENT OFFICE.

ALEXANDER w. KENT, on BoSToN, MASSACHUSETTS.

GAS-BURNING HEATER.

SPECIFIGAJIO-JF forming part Of Letters Patent 0. 698,519, dated April29, 1902.

Application filed June 8, 1900. Serial No. 19.501- (NO model-l To a/ZZwhom it may cm2/cern:

Beit known that LALEXANDER W. KENT, of Boston, in the county of Suffolkand State of Massachusetts,have invented certain new and usefulImprovements in Gas-Burning IIeati ers, of which the following is aspecification.

The object of this invention is to provide a gas-burning heater having agas holding chamber and a great number of annular burners in each ofwhich the outlet from the gaspassage is made separately adjustable, sothat the quantity of gas escaping,and consequently the size of eachflame,fmay be ,readily regulated.

My invention is embodied in a gas-holding chamber having top and bottomplates, preferably dat and parallel, connected by mar-A ginal Walls,properly riveted, and by intermediate studs or bolts, such plates havinga multiplicity of threaded perforations registering with each other, butsmaller in the under than in the upper plate, in combination withconcentric tubes adjustably set in saidper forations rising toapproximately the same height above the upperplate and beveled or flaredat the top to overlap somewhat, so as to vary the outlet between themwhen either tube is adj ustedvertically. These tubes will be threaded atthe foot to engage threads formed in said plates for adjustment by ro`tation and to receive a locking-nut, if required. The tubes will be heldexactly concentric by means of indentations of the outer tubes bearingagainst the inner ones or otherwise. The inner tube may be rotated foradjustment while the burner is in use by inserting a suitable instrumentinto the foot` thereof to engage au indentation or other irregularity onits inner Wall.

In the drawings, Figure l is avertical section through two of theburners and the edge of the chamber on line l l of Fig. 2. Fig'. 2 is aplan of part of the heater, showing one burner in cross-section on line2 2 of Fig. 1. Fig. 3 represents in section and isometric perspectiveone of my improved heaters, showing the multiplicity of independentburners, each with itsvdistinct conical flame and'all grouped in oneeffective heater. Fig. 4 shows in section a single burner-top and itshollow flame.

A. represents the top plate, B the bottom plate, and C the marginal wallsecured together by a succession of rivets D. If the plates aresufficiently flexible to yield under pressure of the inclosed gas, theyWill be stayed at intervals by connecting studs or bolts E.

The plates A and B have a multiplicity of threaded perforations toreceive the onteitubes F and the inner tubes G, set respectively thereinby their threaded lower ends, these tubes being so located and of suchlength as to be concentric and rise to about the same height, leavingannular gas-passages H between them. To insure the proper concentricposition, I prefer to indent the outer tube at points about one hundredand twenty degrees apart, so as to bear against the inner tubes, as atJ, Figs. l and 2.`

The gas-outlet at the upper end of each burner is made adjustable tovary the volume of gas escaping by rotation of either tube. Figs. l and4 represent the inner tube bev eled'inwardly at top and the top of theouter tube turned inwardly about parallel with such beveled part, thusproducing the conical [lame M of Figs. 3 and Il. It will be obvious thatif the outer tube is screwed slightly down or the inner tube similarlyraised these inclined surfaces will approach each other and that theywill recede if the movements are reversed. Simiarly, lone tube mayhave aradial flange form ed on it, extending over the top of the other, andthe size of the annular openin g may be varied by rotating either tube.I prefer to have the outer tube practically permanent in place and toadjust the inner one with relation to it, as this can be done frombeneath the chamber while the burners are lighted, when the cifect ofadjustment can be observed. An. indentation K maybe made in the wall ofthe tube G, or a notch or other irregularity may be formed in its lowerend to receive a suitable tool for this purpose. A lock-nut L may beemployed to fix each tube in position when adjusted.

My heater is peculiarly eective for steammaking in the boilers ofautomobiles and for like uses by reason of the intense heat concentratedin a limited space due to the per* fect combustion of the closely-setindividual burners, each of which producesa persistent perfectly-conicalblue flame M, because the IOO adjustable tubes are held strictlyconcentric at top, so that the escaping gas is maintained as an unbrokenannulus and the arne is de- Hected inwardly not only mechanically b vthe parallel terminal offset surfaces of the tubes, but also by thenatural tendency of the ame to seek the oxygen in the column of airrising through the inner tube. A heater formed of a multiplicity of suchburners separately adjustable and grouped for use as one issubstantially unlike any prior structure known to me. The simplicity oftheindividual burner and the effective grouping of the great nulnber ofindependent hollow conical flames distinguish my device from all others.

Heaters have before been used having an annular gas-passage surroundinga central air-tube; but I am not aware of any prior heating apparatuscomposed ot' a multiplicity of distinct burners of uniform height eachformed of two concentric tubes terminally flanged or beveled andrelatively adjustable vertically by rotation to vary the area of suchpassage, and thus to permit regulating each flame independently Whilethe heater is in use.

I claim as my inventionl. The described heater comprising the gasholdingcharnberandamultiplicity ofcloselyset annular burners of uniform height,each consisting of the concentric tubes Fand G erected respectively inperforations in the upper and Vlower plates of the chamber, each tube Gbeing threaded at foot, rising through the chamber common to al1,`andmechanically held central within the corresponding tube F, the outermostof such tubes extending terminally over the other, and one beingadjustable vertically,relatively to the other, to Vary the annulardischarge-orifice, substantially as set forth.

2. The improved heater consisting of the chamber A B C, and amultiplicity of uniform annular burners, comprising the series of tubesF deflected inwardly at top and set in perforations in the top plate A,and the series of tubes G, beveled and mechanically held at topconcentric With the tubes F and threaded in the bottom plate B, suchtubes G being separately adjustable vertically to vary the area of theannular gas-orifice at the top of each burner, said constructionproducing a single heater having a great number of distinct andseparately-'adjustable conical flames, grouped for use as one,substantially as set forth.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

ALEXANDER W. KENT.

Witnesses: Y

A. H. SPENCER, M. C. POWER.

